[Old Pedant]

(it becomes disabled when it saves and is only enabled once changes are made to the page)

That code isn't shown here. I assume it's independent of the grease monkey stuff?

That code doesn't look too ugly, to me (well, except that your code indentations isn't pretty <grin/>).

I think you could get away with doing it like this, though:

<script>
(
  function() 
  {
      var button = document.getElementById("store");

      button.onclick = function(){ alert("saved"); } // optional

      function clickIt()
      {
          if ( ! button.disabled) { button.click( ); }
      }
      setInterval(clickIt,10000);
  }
)();
</script>

After all, how long is a save going to take? Surely not more than 9.9 seconds?

So why bother with clearing and setting the timeout over and over again?